Most frozen stew vegetables are heated in the microwave using steam-in-bag instructions or warmed on the stovetop; packages generally note that the vegetables must be fully cooked before serving.
Packages commonly state the product should be cooked until hot throughout and often specify an internal temperature of 165°F for food safety.
Package weights in the results range from about 5.8 ounces up to 28 ounces, with many bags commonly offered at around 10–12 ounces.
Full-bag microwave directions most often specify about 5–6 minutes; some listings give shorter times (about 2–4 minutes) for smaller portions or cup-based servings.
Labels show a mix: some items are noted as fully cooked or prepared (for example, sautéed chopped onion), while others are blanched or indicated as needing to be fully cooked before serving.